Alert archive / Illinois / Mesoscale Discussions in 2005

Mesoscale Discussion 2035

August 19, 200529 counties in Illinois; 14 counties in Indiana; 5 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Aug 19, 2005, 4:09 PM CDT for 29 counties in Illinois; 14 counties in Indiana; 5 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Aug 19, 2005, 4:09 PM CDT (21:09 UTC)
Expired
Aug 19, 2005, 6:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 48 counties

Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Christian County, IL, Clay County, IL, Clinton County, IL, Crawford County, IL, Cumberland County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Greene County, IL, Jasper County, IL, Jersey County, IL, Lawrence County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Montgomery County, IL, Morgan County, IL, Pike County, IL, Richland County, IL, Sangamon County, IL, Scott County, IL, Shelby County, IL, Wabash County, IL, Wayne County, IL, Crawford County, IN, Daviess County, IN, Dubois County, IN, Gibson County, IN, Greene County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Spencer County, IN, Sullivan County, IN, Warrick County, IN, Lewis County, MO, Lincoln County, MO, Marion County, MO, Pike County, MO, Ralls County, MO

The radar

The St Louis radar (KLSX), 101 km from the middle of the area, began a volume at 21:09 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.2 hours before the alert went out and 145 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2005-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 138 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2005-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
138 J/kg
Mixed-layer CIN
-277 J/kg
Mixed-layer LCL
1111 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 18, 8:00 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Fulton, Greene, Hancock and 9 more2 hr
Aug 18, 9:28 PM CDTMesoscale DiscussionSPCCook, Lake92 min
Aug 18, 9:53 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 18 more67 min
Aug 18, 10:25 PM CDTSevere Thunderstorm WatchSPCCass, Champaign, Christian, Clark, Coles, Crawford and 24 more8 hr
Aug 18, 11:15 PM CDTMesoscale DiscussionSPCAdams, Brown, Hancock, McDonough, Pike60 min
Aug 19, 4:24 AM CDTMesoscale DiscussionSPCCrawford66 min
Aug 19, 12:49 PM CDTMesoscale DiscussionSPCCrawford, Lawrence, Wabash86 min
Aug 19, 12:52 AM CDTMesoscale DiscussionSPCBartholomew, Boone, Brown, Dearborn, Decatur, Delaware and 25 more83 min
Aug 19, 1:50 PM CDTMesoscale DiscussionSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 18 more115 min
Aug 19, 3:20 PM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Buchanan, Clay, DeKalb, Gentry and 4 more7 hr
Aug 19, 5:41 PM CDTMesoscale DiscussionSPCAndrew, Buchanan, Clay, Platte2 hr

Nearby

Mesoscale Discussions in Illinois, 2005Mesoscale Discussions in Indiana, 2005Mesoscale Discussions in Missouri, 2005Every mesoscale discussion in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.